78897508 has 6 divisors (see below), whose sum is σ = 138070646. Its totient is φ = 39448752.

The previous prime is 78897503. The next prime is 78897517. The reversal of 78897508 is 80579887.

It can be written as a sum of positive squares in only one way, i.e., 51523684 + 27373824 = 7178^2 + 5232^2 .

It is a super-2 number, since 2×78897508² = 12449633537220128, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (78897503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9862185 + ... + 9862192.

Almost surely, 2^78897508 is an apocalyptic number.

It is an amenable number.

78897508 is a deficient number, since it is larger than the sum of its proper divisors (59173138).

78897508 is a wasteful number, since it uses less digits than its factorization.

78897508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19724381 (or 19724379 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 52.

The square root of 78897508 is about 8882.4269206113. The cubic root of 78897508 is about 428.8984025599.

The spelling of 78897508 in words is "seventy-eight million, eight hundred ninety-seven thousand, five hundred eight".